Adjective

1. Of an English accent, pronouncing the letter r wherever it appears, as in bar (/bɑːr/) and bard or barred (/bɑːrd/); this trait is common in much of the United States, Canada, many parts of the north and west of England, Ireland, and Scotland.
2. Of a phoneme, it has the quality of the said letter. This includes the sounds of the IPA symbols /ɹ/, /ɻ/, /ɚ/, /ɝ/, and some would say /r/, or has r coloring.